Triangles A B C and P Q R are both isosc...

Triangles `A B C` and `P Q R` are both isosceles with `A B=A C` and `P Q=P R` respectively. If also, `A B=P Q\ a n d\ B C=Q R ,` are the two triangles congruent? Which condition do you use? If`/_\ B=\ 50^0,` what is the measure of`/_R ?`

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